Remote Sensing C

Test your knowledge of various Science Olympiad events.
Private Wang Fire
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Re: Remote Sensing C

Postby Private Wang Fire » December 31st, 2016, 6:37 am

I think the way it's supposed to work is one person asks a question, and then someone else answers. The person that answered then asks another question. Here, I'll start us off. How do RAR and SAR work,and what are their uses and advantages over the other?
Yeahhh lol.
My answer
Real aperture radar - uses a real antenna to receive backscattering from the radio wave it emits; requires absurdly long antennae for finer resolutions Synthetic aperture radar - uses the movement of the RS platform to mimic longer antenna lengths; allows for finer resolution imaging without having to build really long antennae Not sure what the advantages of RAR over SAR are.. :cry:
MASON HIGH SCHOOL '18

hearthstone224
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Re: Remote Sensing C

Postby hearthstone224 » January 2nd, 2017, 6:03 pm

Sorry guys for not following the ways of the forum haha. I'm a bit new if you cannot tell.

Can you ask the next question Private Wang?
End of freshman season. Good luck to everyone! No state for us, but nevertheless great season. Regional was out of 12 teams. (CLC)

Mat Sci-> Second at regionals
RSensing -> First at regionals
Towers-> Third at regionals.

Private Wang Fire
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Re: Remote Sensing C

Postby Private Wang Fire » January 11th, 2017, 4:52 pm

Sorry guys for not following the ways of the forum haha. I'm a bit new if you cannot tell.

Can you ask the next question Private Wang?
Ah yeah. woops. lil' late
Image
[img]https://s23.postimg.org/zed2fqomj/ceres.png[/img]
1. Which instrument collected the data for this image and what satellite is it on?
2. What does the name of the instrument stand for?
3. What do the higher shortwave flux areas of the top image most likely give the position of?
4. How do the two images relate to each other and the earth's energy budget?
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Re: Remote Sensing C

Postby hearthstone224 » January 12th, 2017, 4:48 am

1. It is CERES? And if it is, it should be on Terra and Aqua satellites.
2. The instrument stands for Clouds and the Earth's Radiant Energy System.
3. Maybe the warmer parts of the earth, or global warming indicators?
4. They relate because they both show the different temperatures of the earth, and I guess the places that emit too much energy flux need to cut down on their use of greenhouse gases and such.

Am I kinda right? I won't post next question in case I'm wrong.
End of freshman season. Good luck to everyone! No state for us, but nevertheless great season. Regional was out of 12 teams. (CLC)

Mat Sci-> Second at regionals
RSensing -> First at regionals
Towers-> Third at regionals.

Private Wang Fire
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Re: Remote Sensing C

Postby Private Wang Fire » January 12th, 2017, 5:37 pm

1. It is CERES? And if it is, it should be on Terra and Aqua satellites.
2. The instrument stands for Clouds and the Earth's Radiant Energy System.
3. Maybe the warmer parts of the earth, or global warming indicators?
4. They relate because they both show the different temperatures of the earth, and I guess the places that emit too much energy flux need to cut down on their use of greenhouse gases and such.

Am I kinda right? I won't post next question in case I'm wrong.
Um kinda close
1. Yup 2. Good 3. It's mostly areas with cloud cover 4. The areas covered with clouds (observed in the first image) have lower outgoing (longwave) radiant flux (second image), keeping more energy in the atmosphere.
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hearthstone224
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Re: Remote Sensing C

Postby hearthstone224 » January 12th, 2017, 7:02 pm

Cool, I get next question!?

What is Stefan-Boltzmann's Law and what is it used for?
End of freshman season. Good luck to everyone! No state for us, but nevertheless great season. Regional was out of 12 teams. (CLC)

Mat Sci-> Second at regionals
RSensing -> First at regionals
Towers-> Third at regionals.

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Clematis
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Re: Remote Sensing C

Postby Clematis » January 15th, 2017, 5:56 am

Cool, I get next question!?

What is Stefan-Boltzmann's Law and what is it used for?
Answer
Stefan-Boltzmann's Law is the equation E = σT^4 Where E = energy /m^2 emitted by the blackbody (energy flux) σ = Stefan Boltzmann's Constant = 5.670367(13)×10^−8 W m^−2 K^−4 T = Temperature of the blackbody in Kelvin It is used to calculate E, the total energy flux of a blackbody at a specific temperature.
"The most dangerous thing you could've done was give them a glimmer of hope. By letting them see that the impossible was possible, you ignited a fire within them. Now, they know that they can do it, and they won't stop until they have."

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Re: Remote Sensing C

Postby hearthstone224 » January 15th, 2017, 6:39 am

That's right! You have next quesiton.
End of freshman season. Good luck to everyone! No state for us, but nevertheless great season. Regional was out of 12 teams. (CLC)

Mat Sci-> Second at regionals
RSensing -> First at regionals
Towers-> Third at regionals.

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Re: Remote Sensing C

Postby Clematis » January 16th, 2017, 8:29 am

Multipart question time!
I know that SSO was already touched upon, but...

1. What do SSO, GSO, and GEO stand for?
2. Compare and contrast the three.
3. Give an example of a real-world application for each in which they might be used. (Bonus points if it deals with climate change!)
"The most dangerous thing you could've done was give them a glimmer of hope. By letting them see that the impossible was possible, you ignited a fire within them. Now, they know that they can do it, and they won't stop until they have."

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Re: Remote Sensing C

Postby hearthstone224 » January 16th, 2017, 2:54 pm

1. SSO is a sun-synchronous orbit. GEO is a geostationary orbit. GSO is a Geosynchronous orbit.

2. A Geostationary orbit is one where the satellite is at the same point in the sky each day. A geosynchronous orbit is where a satellite returns to the same point in the sky at the same moment each day. It rotates with the earth's spin. Note that a geostationary orbit is one type of geosynchronous orbit. Finally, a sun-synchronous orbit is one that always faces the sun and goes over the poles. Thus, it will seem like on earth it is going up and down. It is well suited for remote sensing since the sun is always shining bright so climate satellites have an easy time observing.

3. The AMC satellites are in geostationary orbit. Other satellites such as weather satellites and communication satellites are also in geosynchronous orbit. For Sun-synchronous orbit, we have Terra and Aqua. Finally for geosynchronous we have the same satellites that are geostationary (sorry, I'm kinda lazy lol).

Amirite? Thanks.
End of freshman season. Good luck to everyone! No state for us, but nevertheless great season. Regional was out of 12 teams. (CLC)

Mat Sci-> Second at regionals
RSensing -> First at regionals
Towers-> Third at regionals.

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Clematis
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Re: Remote Sensing C

Postby Clematis » January 16th, 2017, 4:23 pm

1. SSO is a sun-synchronous orbit. GEO is a geostationary orbit. GSO is a Geosynchronous orbit.

2. A Geostationary orbit is one where the satellite is at the same point in the sky each day. A geosynchronous orbit is where a satellite returns to the same point in the sky at the same moment each day. It rotates with the earth's spin. Note that a geostationary orbit is one type of geosynchronous orbit. Finally, a sun-synchronous orbit is one that always faces the sun and goes over the poles. Thus, it will seem like on earth it is going up and down. It is well suited for remote sensing since the sun is always shining bright so climate satellites have an easy time observing.

3. The AMC satellites are in geostationary orbit. Other satellites such as weather satellites and communication satellites are also in geosynchronous orbit. For Sun-synchronous orbit, we have Terra and Aqua. Finally for geosynchronous we have the same satellites that are geostationary (sorry, I'm kinda lazy lol).

Amirite? Thanks.

I think you meant to say geostationary for weather and communication satellites, but either way, you're right. Your turn.
"The most dangerous thing you could've done was give them a glimmer of hope. By letting them see that the impossible was possible, you ignited a fire within them. Now, they know that they can do it, and they won't stop until they have."

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Re: Remote Sensing C

Postby Clematis » February 2nd, 2017, 7:20 pm

Let's get this started again!

How does the atmosphere affect remote sensing? (I know this is very vague and there are a variety of ways it can be answered. You can provide one way or multiple. Feel free to be however specific - or general - that you want.)
"The most dangerous thing you could've done was give them a glimmer of hope. By letting them see that the impossible was possible, you ignited a fire within them. Now, they know that they can do it, and they won't stop until they have."

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Re: Remote Sensing C

Postby hearthstone224 » February 3rd, 2017, 8:17 am

Sorry for not starting it up again. I forgot because I was preparing for an invitational.

OK, here's what I found. I found that the scattering of visible and infared light is the kind that has the highest effect on the appearance of an image. For example, images often appear hazy because of solar radiation that reaches the sensor without reaching the ground first. This is particularly severe in the blue end of the spectrum due to Rayleigh Scattering.

Absorption also occurs which makes sense I guess because then the radiation is totally absorbed and so you don't get an accurate reading.
End of freshman season. Good luck to everyone! No state for us, but nevertheless great season. Regional was out of 12 teams. (CLC)

Mat Sci-> Second at regionals
RSensing -> First at regionals
Towers-> Third at regionals.

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Clematis
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Re: Remote Sensing C

Postby Clematis » February 6th, 2017, 3:36 pm

Sorry for not starting it up again. I forgot because I was preparing for an invitational.

OK, here's what I found. I found that the scattering of visible and infared light is the kind that has the highest effect on the appearance of an image. For example, images often appear hazy because of solar radiation that reaches the sensor without reaching the ground first. This is particularly severe in the blue end of the spectrum due to Rayleigh Scattering.

Absorption also occurs which makes sense I guess because then the radiation is totally absorbed and so you don't get an accurate reading.
It's fine. We all get too busy at times, especially with looming competitions. ;) Correct, your turn.
"The most dangerous thing you could've done was give them a glimmer of hope. By letting them see that the impossible was possible, you ignited a fire within them. Now, they know that they can do it, and they won't stop until they have."

hearthstone224
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Re: Remote Sensing C

Postby hearthstone224 » February 6th, 2017, 6:25 pm

Awesome!

Describe the difference between along track and across track scanning, and give the more informal names of these types of scanning for an extra point.
End of freshman season. Good luck to everyone! No state for us, but nevertheless great season. Regional was out of 12 teams. (CLC)

Mat Sci-> Second at regionals
RSensing -> First at regionals
Towers-> Third at regionals.


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